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<H2><B>set barbase</B></H2><P>
<code>set barbase<i> val|bottom|top</i></code><p>
If <code>val</code> is given, each bar rises or falls from that value,
assuming the value is within the plotting range. If <code>bottom</code> is
specified, each bar rises from the bottom of the plot. If <code>top</code>
is specified, each bar falls from the top of the plot.<p>
<H3>Usage Note</H3><P>
<H3>Examples</H3><P>
